MAGNETIC COLD STORAGE MATERIAL PARTICLE, COLD STORAGE DEVICE, REFRIGERATING MACHINE, CRYOPUMP, SUPERCONDUCTING MAGNET, NUCLEAR MAGNETIC RESONANCE IMAGING APPARATUS, NUCLEAR MAGNETIC RESONANCE APPARATUS, MAGNETIC-FIELD-APPLICATION-TYPE SINGLE CRYSTAL PULLING APPARATUS, AND HELIUM RE-CONDENSATION APPARATUS

Magnetic cold storage material particles with a low breakage rate in the case of being subjected to long-term vibration caused by operation of a refrigerator under a cryogenic temperature are provided. A cold storage device and a refrigerator, each of which includes the above-described magnetic cold...

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Bibliographische Detailangaben
Hauptverfasser:	KAWAMOTO, Takahiro, USUI, Daichi, HIRAMATSU, Ryosuke
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES BASIC ELECTRIC ELEMENTS BLASTING CHEMISTRY COMBINED HEATING AND REFRIGERATION SYSTEMS DIAGNOSIS DYES ELECTRICITY HEAT PUMP SYSTEMS HEATING HUMAN NECESSITIES HYGIENE IDENTIFICATION INDUCTANCES INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES MAGNETS MANUFACTURE OR STORAGE OF ICE MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE MEASURING MECHANICAL ENGINEERING MEDICAL OR VETERINARY SCIENCE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PHYSICS POLISHES REFRIGERATION MACHINES, PLANTS OR SYSTEMS REFRIGERATION OR COOLING SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SURGERY TESTING TRANSFORMERS WEAPONS
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Beschreibung
Zusammenfassung:	Magnetic cold storage material particles with a low breakage rate in the case of being subjected to long-term vibration caused by operation of a refrigerator under a cryogenic temperature are provided. A cold storage device and a refrigerator, each of which includes the above-described magnetic cold storage material particles and does not degrade refrigeration performance under long-term operation, are provided. Apparatuses provided with this refrigerator, such as a superconducting magnet, are provided.Each magnetic cold storage material particle of the embodiment is composed of an intermetallic compound containing a rare earth element, and an area percentage of voids present in its cross-section is 0.0001% or more and 15% or less. Each of the cold storage device of the embodiment, the refrigerator of the embodiment, and the apparatuses provided with this refrigerator, such as a superconducting magnet, includes the magnetic cold storage material particles of the embodiment.